Question

factories: x^2-2+1/x^2-y^2​

Answer 1

Answer:

x^2-y^2-2y-1

=x^2-(y^2+2y+1)

=x^2-(y^2+2•y•1+1^2)

=x^2-(y+1)^2

=[x+(y+1)][x-(y+1)]

=[x+y+1][x-y-1].....

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Answer 2

Answer:

$\frac{{x}^{2} - 2 + 1}{ {x}^{2} - {y}^{2} } = \frac{ {x}^{2} - 1 }{(x + y)(x - y)}$

$\frac{ {x}^{2} - {1}^{2} }{ {x}^{2} - {y}^{2} }$

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